Argentina striker Hernan Crespo has called on his teammates to maintain the form they produced in their 6-0 drubbing of Serbia and Montenegro in the World Cup. "We put on a great performance - the challenge is to maintain it," BBC quoted Crespo as saying on Tuesday. "I'm very proud I played a part in that match, but I feel it will be difficult to improve on the level we showed,” he added. Argentina opened their World Cup campaign with two victories over Ivory Coast and Serbia which lifted them to the knock-out stage. The two-time world champions will face Holland, who were also guaranteed a place in the second round after two successive wins, on Wednesday in a clash that will determine who will finish on top of Group C. "We must manage the game as we did against Serbia & Montenegro, although that will be tough," the Chelsea striker said. "Teams have been having their moments during the tournament. But there hasn't been a team who has managed to maintain a constant level for the whole 90 minutes in the first two matches. "Argentina are getting better. We're proud of what we did in the second game. We're looking to make a name for ourselves, just like the rest of the teams,” he added.